Honor the --secure-protocol flag in the GNU TLS backend.

[wget] / src / gnutls.c

diff --git a/src/gnutls.c b/src/gnutls.c
index 30ed5e17f7d81cabae04e6075f23935fa0eb4468..3c4c5b4cf6f8383e9be5a13fa30b988343c4217c 100644 (file)
--- a/src/gnutls.c
+++ b/src/gnutls.c
@@ -47,6 +47,10 @@ as that of the covered work.  */
 #include "url.h"
 #include "ssl.h"
 
+#ifdef WIN32
+# include "w32sock.h"
+#endif
+
 /* Note: some of the functions private to this file have names that
    begin with "wgnutls_" (e.g. wgnutls_read) so that they wouldn't be
    confused with actual gnutls functions -- such as the gnutls_read
@@ -192,11 +196,42 @@ ssl_connect_wget (int fd)
   struct wgnutls_transport_context *ctx;
   gnutls_session session;
   int err;
+  int allowed_protocols[4] = {0, 0, 0, 0};
   gnutls_init (&session, GNUTLS_CLIENT);
   gnutls_set_default_priority (session);
   gnutls_certificate_type_set_priority (session, cert_type_priority);
   gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, credentials);
-  gnutls_transport_set_ptr (session, (gnutls_transport_ptr) fd);
+#ifndef FD_TO_SOCKET
+# define FD_TO_SOCKET(X) (X)
+#endif
+  gnutls_transport_set_ptr (session, (gnutls_transport_ptr) FD_TO_SOCKET (fd));
+
+  err = 0;
+  switch (opt.secure_protocol)
+    {
+    case secure_protocol_auto:
+      break;
+    case secure_protocol_sslv2:
+    case secure_protocol_sslv3:
+      allowed_protocols[0] = GNUTLS_SSL3;
+      err = gnutls_protocol_set_priority (session, allowed_protocols);
+      break;
+    case secure_protocol_tlsv1:
+      allowed_protocols[0] = GNUTLS_TLS1_0;
+      allowed_protocols[1] = GNUTLS_TLS1_1;
+      allowed_protocols[2] = GNUTLS_TLS1_2;
+      err = gnutls_protocol_set_priority (session, allowed_protocols);
+      break;
+    default:
+      abort ();
+    }
+  if (err < 0)
+    {
+      logprintf (LOG_NOTQUIET, "GnuTLS: %s\n", gnutls_strerror (err));
+      gnutls_deinit (session);
+      return false;
+    }
+
   err = gnutls_handshake (session);
   if (err < 0)
     {
@@ -204,6 +239,7 @@ ssl_connect_wget (int fd)
       gnutls_deinit (session);
       return false;
     }
+
   ctx = xnew0 (struct wgnutls_transport_context);
   ctx->session = session;
   fd_register_transport (fd, &wgnutls_transport, ctx);